Core-pulling mold and demolding method

Abstract

The invention relates to the technical field of injection molds, and provides a core-pulling mold which comprises an upper mold, a lower mold, a mold core and a core-pulling assembly, and an injection molding cavity used for forming a water outlet nozzle is formed between the upper mold and the lower mold; the mold core is arranged in the injection molding cavity and is used for forming an arc-shaped cavity of the water outlet nozzle; the core pulling assembly is connected with the mold core and is used for pulling the mold core away from the water outlet nozzle; the core pulling assembly comprises a driving part, a translation seat, a connecting rod and a rotating seat, the translation seat is horizontally and movably arranged on the lower mold, and the driving part is connected with the translation seat and used for controlling the translation seat to move; the rotating seat is rotatably connected to the lower die, and the die core is arranged on the rotating seat; the two ends of the connecting rod are hinged to the translation base and the rotating base respectively, and when the translation base moves horizontally, the rotating base rotates. The injection molding device has the effect of conveniently carrying out injection molding on the water outlet nozzle with the arc-shaped cavity.

Description

Technical Field

[0001] The present application relates to the technical field of injection molds, and in particular to a core-pulling mold and a demoulding method. Background Art

[0002] Molds, crucial process equipment in industrial production, are a general term for various molds and tools used to produce desired products through specific processes such as injection molding, blow molding, extrusion, die-casting, forging, smelting, and stamping. Essentially, molds are specialized tools used to manufacture molded objects. Their structure is composed of numerous parts with different functions, and different types of molds differ significantly in their component composition. The working principle of molds is primarily to achieve precise surface processing of an object through the transformation of the molding material's physical state. Due to its fundamental and critical role in industrial production, molds are known as the "mother of industry."

[0003] Injection molds are precision tools specifically designed for producing plastic products. Generally speaking, injection molds consist of two main parts: an upper mold and a lower mold. During the injection molding operation, the upper and lower molds are tightly closed, together forming the runner system and the mold cavity for the plastic product. During the injection molding process, the mold is securely clamped to the injection molding machine, and molten plastic is injected into the mold cavity under high pressure, where it gradually cools and solidifies into shape. At the same time, the molten plastic also cools and solidifies in the runner system, forming a runner system aggregate. After the plastic product is fully formed, the upper and lower molds separate, and the plastic product is ejected from the mold cavity by the ejection system, freeing it from the mold. Subsequently, the upper and lower molds close again, entering the next injection molding cycle. This cycle repeats itself, continuously and efficiently completing the production of plastic products.

[0004] Existing products with channel structures usually require a core-pulling structure for forming the channel structure in the mold during injection molding. When demolding the mold, it is usually necessary to use an oil cylinder (or air cylinder) to drive the core-pulling structure to separate the product.

[0005] like Figure 1 The water spout shown has a cylindrical cavity and an arc-shaped cavity. The structure of the existing injection mold is generally only capable of core-pulling molding for cylindrical cavities, but not for arc-shaped cavities, so it needs to be improved. Summary of the Invention

[0006] In order to facilitate the injection molding of a water spout with an arc-shaped cavity, the present application provides a core-pulling mold.

[0007] In the first aspect, the present application provides a core-pulling mold adopting the following technical solution: A core-pulling mold, comprising an upper mold, a lower mold, a mold core, and a core-pulling assembly, wherein the upper mold and the lower mold are arranged relative to each other in an upper and lower direction, and when the upper mold and the lower mold are clamped together, an injection cavity is formed between the upper mold and the lower mold, and the injection cavity is used to form a water spout; The mold core is arranged in the injection cavity and is used to form the arc-shaped cavity of the water outlet; the core pulling assembly is connected to the mold core and is used to pull the mold core out of the water outlet; The core pulling assembly includes a driving member, a translation seat, a connecting rod and a rotating seat. The translation seat is horizontally movably arranged on the lower mold. The driving member is connected to the translation seat and is used to control the movement of the translation seat; the rotating seat is rotatably connected to the lower mold, and the mold core is arranged on the rotating seat; the two ends of the connecting rod are respectively hinged on the translation seat and the rotating seat. When the translation seat moves horizontally, the rotating seat rotates.

[0008] By adopting this technical solution, after the upper and lower molds are closed, molten plastic is injected into the injection cavity for molding. Once the spout is formed, the upper and lower molds are controlled to separate. The driver then operates, controlling the translating seat to move linearly away from the injection cavity. This movement of the translating seat drives the connecting rod. This movement of the connecting rod drives the rotating seat to oscillate in a circular motion. With its axis aligned vertically, the rotating seat drives the mold core in an arc-shaped trajectory, thus achieving arc-shaped core pulling and facilitating product demolding.

[0009] Preferably, the driving member is an air cylinder, an oil cylinder or an electric push rod, and the piston rod of the air cylinder, the oil cylinder or the electric push rod is connected to the translation seat.

[0010] By adopting the above technical solution, an air cylinder, an oil cylinder or an electric push rod can be used to control the horizontal linear motion of the translation seat.

[0011] Preferably, the lower die is provided with a guide groove, and the translation seat is movably arranged in the guide groove; the lower die is also provided with a limiting groove, and the limiting groove is used to limit the rotating seat.

[0012] By adopting the above technical solution, the guide groove can guide the movement of the translation seat, improving the stability of the translation seat during movement. Similarly, when the rotating seat is performing circular motion, the presence of the limit groove can limit the movement of the rotating seat, ensuring the movement trajectory of the rotating seat.

[0013] Preferably, the mold core includes a first cylindrical portion and an arc-shaped portion, one end of the first cylindrical portion is connected to the translation seat, and the first cylindrical portion is used to form a cylindrical cavity of the water spout; one end of the arc-shaped portion abuts against the outer side wall of the first cylindrical portion, and the other end is hinged to the rotating seat, and the arc-shaped portion is used to form an arc-shaped cavity of the water spout.

[0014] By adopting the above technical solution, the first cylindrical portion can be used to form the cylindrical cavity of the water spout, and the curved portion can be used to form the curved cavity of the water spout. When the translation seat moves, the first cylindrical portion will move linearly, while the curved portion will move in an arc, achieving simultaneous core pulling and improving production efficiency.

[0015] Preferably, the arc-shaped portion is detachably connected to the rotating seat, and a mounting block is provided at one end of the arc-shaped portion away from the first cylindrical portion. A mounting groove is provided on the rotating seat, and the mounting block is locked in the mounting groove by a fastener, and the fastener is a fastening bolt or a fastening screw.

[0016] By adopting the above technical solution, the fastener locks the mounting block in the mounting groove, realizing a detachable connection between the arc portion and the rotating seat. When arc cavities of different diameters need to be formed, the arc portion can be disassembled and replaced, thereby improving production flexibility.

[0017] Preferably, it also includes a second cylindrical portion, a slider, a slide seat and a fixed column, the second cylindrical portion and the first cylindrical portion are on the same straight line, the second cylindrical portion is used to form a cylindrical cavity of the water spout, the second cylindrical portion is provided on the slider, the slide seat is provided on the lower mold, and the slider is slidably connected to the slide seat; the fixed column is inclined and passes through the slider, the slide seat is provided with a makeshift groove for the fixed column to swing, and the fixed column is used to control the horizontal movement of the slider.

[0018] By adopting this technical solution, the second cylindrical portion, like the first, is used to form the cylindrical cavity of the water spout. Once the spout is formed, the operator can apply external force to the fixed column to control the slider to move horizontally on the slide away from the injection cavity, achieving core pulling.

[0019] Preferably, the upper mold is provided with an injection port, and the injection port is communicated with the injection cavity.

[0020] By adopting the above technical solution, the molten plastic can enter the injection cavity from the injection port to achieve molding.

[0021] Preferably, a linkage component is further included, which is used to connect the translation seat and the fixed column. When the driving member controls the translation seat to move away from the injection cavity, the fixed column swings and drives the slider to move in a direction away from the injection cavity.

[0022] By adopting the above technical solution, when the driving member controls the translation seat to move in the direction away from the injection cavity, the presence of the linkage assembly can drive the fixed column to swing, so that the slider gradually moves away from the injection cavity, that is, the first cylindrical part and the second cylindrical part move away from each other, thereby achieving simultaneous core pulling.

[0023] Preferably, the linkage assembly includes a moving rod, a first wedge block and a second wedge block, the moving rod is connected to the translation seat and is movably arranged on the lower mold, and the moving direction of the moving rod and the translation seat is the same; the first wedge block and the second wedge block are both arranged on the moving rod, the wedge surface of the first wedge block and the wedge surface of the second wedge block are arranged opposite to each other, and the fixed column is located between the first wedge block and the second wedge block.

[0024] By adopting this technical solution, during core pulling, the driver controls the translation seat to move away from the injection cavity, and the moving rod follows the translation seat in the same direction. As the moving rod moves, the fixed column is pushed by the second wedge block, causing it to swing, causing the slider to move linearly on the slide seat away from the injection cavity, achieving the separation of the first and second cylindrical portions.

[0025] When the driving member controls the translation seat to gradually approach the injection cavity, the translation seat drives the moving rod to move synchronously, so that the fixed column is acted upon by the thrust of the first wedge block, thereby swinging. At this time, the slider moves in the direction close to the injection cavity, so that the first cylindrical part and the second cylindrical part approach each other.

[0026] In a second aspect, the present application further provides a demoulding method, which uses a core-pulling mold having all the above structures, comprising the following steps: S1. After the product spout is formed, the upper mold and the lower mold are controlled to separate from each other, and the product remains on the mold core; S2. Run the driving component, which controls the translation seat to move linearly in the direction away from the injection cavity. The translation seat drives the connecting rod to move; the connecting rod drives the rotating seat to swing in a circle, thereby controlling the mold core to move in an arc trajectory, realizing arc core pulling and completing the demolding of the product.

[0027] In summary, this application includes at least one of the following beneficial technical effects: (1) By setting up a driving member, a translation seat, a connecting rod and a rotating seat, after the water outlet nozzle is formed, the upper mold and the lower mold are controlled to separate from each other; then the driving member is operated, and the driving member controls the translation seat to move linearly in the direction away from the injection cavity. The movement of the translation seat will drive the connecting rod to move. The movement of the connecting rod will drive the rotating seat to swing in a circle. The rotating seat's axis is in the vertical direction, and the rotating seat drives the mold core to move in an arc trajectory, thereby realizing arc core pulling.

[0028] (2) By setting the guide groove and the limit groove, the guide groove can guide the movement of the translation seat, and the limit groove can limit the range of the movement trajectory of the rotation seat.

[0029] (3) By setting up a linkage assembly, the movement of the translation seat can drive the fixed column to move, so that the first cylindrical part and the second cylindrical part move away from or closer to each other, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural diagram of the water outlet in the background technology of this application; Figure 2 This is a schematic structural diagram of a core-pulling mold in an embodiment of the present application; Figure 3 Schematic diagram of an explosion of a core-pulling mold in an embodiment of the present application; Figure 4 This is a partial structural diagram of the core-pulling mold in the embodiment of the present application; Figure 5 It is a partial structural diagram of a core-pulling mold in another embodiment of the present application.

[0031] Figure markings: 1. upper mold; 2. lower mold; 3. mold core; 31. first cylindrical portion; 32. arc-shaped portion; 4. core-pulling assembly; 41. driving member; 42. translation seat; 43. connecting rod; 44. rotating seat; 5. injection cavity; 6. injection port; 7. guide groove; 8. limit groove; 9. mounting block; 10. mounting groove; 11. second cylindrical portion; 12. slider; 13. slide seat; 14. fixed column; 15. clearance groove; 16. linkage assembly; 161. moving rod; 162. first wedge block; 163. second wedge block. DETAILED DESCRIPTION

[0032] The following will describe the technical solution of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. The present application can be embodied in many different forms and is not limited to the embodiments described here.

[0033] Throughout the present application, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0035] In the description of the embodiments of this application, unless otherwise specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, integration, or mechanical connections. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this application based on specific circumstances.

[0036] Some embodiments of the present application are described in detail below with reference to the accompanying drawings. In the absence of conflict, those skilled in the art may combine and combine the different embodiments or examples and features of the different embodiments or examples shown in the present application.

[0037] The embodiment of the present application discloses a core-pulling mold. Figures 2 to 4 The core-pulling mold includes an upper mold 1, a lower mold 2, a core 3, and a core-pulling assembly 4. The upper mold 1 and the lower mold 2 are arranged vertically relative to each other, with the upper mold 1 located directly above the lower mold 2. When the upper mold 1 and the lower mold 2 are closed together, an injection cavity 5 is formed between the upper mold 1 and the lower mold 2. The injection cavity 5 is used to form the water spout. The upper mold 1 is provided with an injection port 6, which is connected to the injection cavity 5.

[0038] The core mold 3 is placed in the injection cavity 5 and is used to form the arc-shaped cavity of the water spout. The core pulling assembly 4 is connected to the core mold 3 and is used to pull the core mold 3 out of the water spout. Specifically, the core mold 3 includes a first cylindrical portion 31 and an arc-shaped portion 32. The first cylindrical portion 31 is used to form the cylindrical cavity of the water spout, and the arc-shaped portion 32 is used to form the arc-shaped cavity of the water spout. The core pulling assembly 4 includes a driving member 41, a translation seat 42, a connecting rod 43 and a rotating seat 44. The translation seat 42 is horizontally movably arranged on the lower mold 2. One end of the first cylindrical portion 31 is fixedly connected to the translation seat 42; the driving member 41 is connected to the translation seat 42 and is used to control the movement of the translation seat 42. The driving member 41 is an air cylinder, an oil cylinder or an electric push rod. In this embodiment, it is an air cylinder, and the piston rod of the cylinder is connected to the translation seat 42.

[0039] The rotating base 44 is rotatably connected to the lower mold 2, with its axis of rotation extending vertically. One end of the arcuate portion 32 abuts the outer wall of the first cylindrical portion 31, while the other end is hingedly connected to the rotating base 44. The ends of the connecting rod 43 are hingedly connected to the translation base 42 and the rotating base 44, respectively. When the translation base 42 moves horizontally, the connecting rod 43 drives the rotating base 44 to rotate.

[0040] After the upper mold 1 and lower mold 2 are closed, molten plastic is injected from the injection port 6 into the injection cavity 5 for molding. After the spout is formed, the upper mold 1 and lower mold 2 are controlled to separate from each other; the driver 41 is then operated, which controls the translation seat 42 to move linearly away from the injection cavity 5. The movement of the translation seat 42 not only drives the first cylindrical portion 31 to separate from the spout, but also drives the connecting rod 43 to move. The movement of the connecting rod 43 drives the rotating seat 44 to oscillate in a circular motion, which in turn drives the arc portion 32 to move in an arc trajectory, thereby achieving arc-shaped core pulling and facilitating product demolding.

[0041] As shown, the lower mold 2 is provided with a guide groove 7 and a limit groove 8, within which the translation seat 42 is movably mounted. The guide groove 7 guides the movement of the translation seat 42, improving its stability during movement. The limit groove 8 is located near one side of the injection cavity 5 and is fan-shaped, serving to limit the position of the rotation seat 44, ensuring that its motion trajectory remains within a certain range.

[0042] In this embodiment, the arcuate portion 32 is detachably connected to the rotating base 44. A mounting block 9 is fixedly connected to the end of the arcuate portion 32 distal from the first cylindrical portion 31. A mounting slot 10 is defined in the rotating base 44, and the mounting block 9 is secured within the slot 10 by a fastener, such as a removable bolt or screw. When forming arcuate cavities of varying diameters, the arcuate portion 32 can be removed and replaced, enhancing production flexibility and meeting varying production requirements.

[0043] In addition, the lower mold 2 is also equipped with a second cylindrical portion 11, a slider 12, a slide 13 and a fixed column 14. The second cylindrical portion 11 is on the same straight line as the first cylindrical portion 31. The second cylindrical portion 11 is also used to form the cylindrical cavity of the water spout. One end of the second cylindrical portion 11 is connected to the slider 12, the slide 13 is fixedly connected to the lower mold 2, and the slider 12 is slidably connected to the slide 13. The fixed column 14 is tilted, and one end passes through the slider 12. The slide 13 is provided with a clearance groove 15 for the fixed column 14 to swing. The fixed column 14 is used to control the horizontal movement of the slider 12. After the water spout is formed, the staff can apply external force to the fixed column 14 to control the slider 12 to move horizontally on the slide 13 in a direction away from the injection cavity 5 to achieve core pulling.

[0044] In some embodiments, please combine Figure 5 The lower mold 2 is also equipped with a linkage assembly 16, which is used to connect the translation seat 42 and the fixed column 14. When the driving member 41 controls the translation seat 42 to move away from the injection cavity 5, the fixed column 14 will swing and drive the slider 12 to move away from the injection cavity 5, so that the first cylindrical portion 31 and the second cylindrical portion 11 move away from each other, achieving simultaneous core pulling and improving production efficiency.

[0045] The linkage assembly 16 includes a moving rod 161, a first wedge block 162, and a second wedge block 163. The moving rod 161 is located below and connected to the translation seat 42. The moving rod 161 is movably mounted on the lower mold 2 and moves with the translation seat 42. The first wedge block 162 and the second wedge block 163 are both mounted on the moving rod 161 and are symmetrically arranged. The wedge surfaces of the first wedge block 162 and the second wedge blocks 163 are arranged opposite each other. The fixed column 14 is located between the first wedge block 162 and the second wedge block 163.

[0046] During core pulling, the driver 41 controls the translation seat 42 to move away from the injection cavity 5, and the moving rod 161 moves in the same direction as the translation seat 42. As the moving rod 161 moves, the fixed column 14 is pushed by the second wedge block 163, causing it to swing, causing the slider 12 to move linearly on the slide seat 13 in a direction away from the injection cavity 5, achieving the separation of the first cylindrical portion 31 and the second cylindrical portion 11.

[0047] When the driving member 41 controls the translation seat 42 to gradually approach the injection cavity 5, the translation seat 42 drives the moving rod 161 to move synchronously, so that the fixed column 14 is pushed by the first wedge block 162, thereby swinging. At this time, the slider 12 will move in the direction close to the injection cavity 5, realizing the mutual approach of the first cylindrical part 31 and the second cylindrical part 11.

[0048] The implementation principle of a core-pulling mold in an embodiment of the present application is as follows: after the upper mold 1 and the lower mold 2 complete the mold closing action, the plastic in a molten state is injected into the injection cavity 5 through the injection port 6, and a molding reaction occurs in the cavity. After the spout molding process is completed, the upper mold 1 and the lower mold 2 are controlled to separate from each other. Then the driving member 41 is started, and the driving member 41 controls the translation seat 42 to move linearly in the direction away from the injection cavity 5. The movement of the translation seat 42 will trigger two actions: first, it drives the first cylindrical portion 31 to separate from the molded spout; second, it causes the connecting rod 43 to move synchronously. The displacement of the connecting rod 43 further drives the rotating seat 44 to swing in a circle, and the rotating seat 44 then drives the arc portion 32 to run along an arc trajectory, thereby achieving an arc-shaped core-pulling operation, creating convenient conditions for the smooth demolding of the product.

[0049] Based on the above embodiment, the present application also provides a demoulding method, which uses a core-pulling mold with all the above structures and specifically includes the following steps: First, during stage S1, the mold opening and closing system is precisely controlled to separate the upper mold 1 and lower mold 2 according to a pre-set sequence. During this process, the product remains firmly attached to the mold core 3 due to the unique adhesion between the product and the mold structure, awaiting subsequent demolding.

[0050] Then comes the S2 stage, the driving member 41 is started, and after the driving member 41 starts working, it drives the translation seat 42 to move smoothly in a straight line in a direction away from the injection cavity 5, thereby driving the first cylindrical part 31 to be pulled out from the product.

[0051] As the translating seat 42 moves, the connecting rod 43 also moves accordingly. As a key transmission component, the connecting rod 43 cleverly converts the linear motion of the translating seat 42 into a driving force for the rotating seat 44, causing it to oscillate in a circular motion about a specific axis. The rotating seat 44, in turn, is connected to the arcuate portion 32, thereby controlling the arcuate motion of the arcuate portion 32. As the linear and arcuate core pulling actions are simultaneously completed, the tight bond between the product and the mold core 3 is gradually released, ultimately achieving smooth demolding of the product, completing a crucial step in the entire injection molding process.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A core-pulling mold, characterized in that: The invention comprises an upper mold (1), a lower mold (2), a mold core (3) and a core-pulling assembly (4); the upper mold (1) and the lower mold (2) are arranged relative to each other in an upper and lower direction; when the upper mold (1) and the lower mold (2) are clamped together, an injection cavity (5) is formed between the upper mold (1) and the lower mold (2); the injection cavity (5) is used to mold the water outlet; The mold core (3) is arranged in the injection cavity (5) and is used to form the arc-shaped cavity of the water outlet; the core pulling assembly (4) is connected to the mold core (3) and is used to pull the mold core (3) out of the water outlet; The core pulling assembly (4) includes a driving member (41), a translation seat (42), a connecting rod (43) and a rotating seat (44); the translation seat (42) is horizontally movably arranged on the lower mold (2); the driving member (41) is connected to the translation seat (42) and is used to control the movement of the translation seat (42); the rotating seat (44) is rotatably connected to the lower mold (2), and the mold core (3) is arranged on the rotating seat (44); the two ends of the connecting rod (43) are respectively hinged to the translation seat (42) and the rotating seat (44); when the translation seat (42) moves horizontally, the rotating seat (44) rotates.

2. A core-pulling mold according to claim 1, characterized in that: The driving member (41) is an air cylinder, an oil cylinder or an electric push rod, and the piston rod of the air cylinder, the oil cylinder or the electric push rod is connected to the translation seat (42).

3. A core-pulling mold according to claim 1, characterized in that: The lower die (2) is provided with a guide groove (7), and the translation seat (42) is movably arranged in the guide groove (7); the lower die (2) is also provided with a limiting groove (8), and the limiting groove (8) is used to limit the rotation seat (44).

4. A core-pulling mold according to claim 1, characterized in that: The mold core (3) comprises a first cylindrical portion (31) and an arcuate portion (32); one end of the first cylindrical portion (31) is connected to the translation seat (42); the first cylindrical portion (31) is used to form a cylindrical cavity of the water spout; one end of the arcuate portion (32) abuts against the outer wall of the first cylindrical portion (31); the other end is hinged to the rotation seat (44); the arcuate portion (32) is used to form an arcuate cavity of the water spout.

5. A core-pulling mold according to claim 4, characterized in that: The arc-shaped portion (32) is detachably connected to the rotating seat (44); a mounting block (9) is provided at one end of the arc-shaped portion (32) away from the first cylindrical portion (31); a mounting groove (10) is provided on the rotating seat (44); the mounting block (9) is locked in the mounting groove (10) by a fastener, and the fastener is a fastening bolt or a fastening screw.

6. A core-pulling mold according to claim 4, characterized in that: The present invention also includes a second cylindrical portion (11), a slider (12), a slide seat (13) and a fixed column (14), wherein the second cylindrical portion (11) and the first cylindrical portion (31) are on the same straight line, the second cylindrical portion (11) is used to form a cylindrical cavity of a water spout, the second cylindrical portion (11) is provided on the slider (12), the slide seat (13) is provided on the lower mold (2), and the slider (12) is slidably connected to the slide seat (13); the fixed column (14) is tilted and passes through the slider (12), the slide seat (13) is provided with a clearance groove (15) for the fixed column (14) to swing, and the fixed column (14) is used to control the horizontal movement of the slider (12).

7. The core-pulling mold according to claim 1, characterized in that: The upper mold (1) is provided with an injection port (6), and the injection port (6) is connected to the injection cavity (5).

8. The core-pulling mold according to claim 6, characterized in that: It also includes a linkage assembly (16), which is used to connect the translation seat (42) and the fixed column (14). When the driving member (41) controls the translation seat (42) to move away from the injection cavity (5), the fixed column (14) swings and drives the slider (12) to move in a direction away from the injection cavity (5).

9. The core-pulling mold according to claim 8, characterized in that: The linkage assembly (16) includes a moving rod (161), a first wedge block (162) and a second wedge block (163). The moving rod (161) is connected to the translation seat (42) and is movably arranged on the lower mold (2). The moving rod (161) and the translation seat (42) have the same moving direction. The first wedge block (162) and the second wedge block (163) are both arranged on the moving rod (161). The wedge surface of the first wedge block (162) and the wedge surface of the second wedge block (163) are arranged opposite to each other. The fixed column (14) is located between the first wedge block (162) and the second wedge block (163).

10. A demoulding method using the core-pulling mold according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. After the product water outlet is formed, the upper mold (1) and the lower mold (2) are controlled to separate from each other, and the product is retained on the mold core (3); S2. Operate the driving member (41). The driving member (41) controls the translation seat (42) to move linearly in a direction away from the injection cavity (5). The translation seat (42) drives the connecting rod (43) to move. The connecting rod (43) drives the rotating seat (44) to swing in a circle, thereby controlling the mold core (3) to move in an arc trajectory, realizing arc core pulling, and completing the demoulding of the product.

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